Our Sahara PS, ND, and Nevada WF Classicure Yellow, and Magenta inks are lightfast to Blue Wool 5. All Cyan and Black inks are Blue Wool 7-8.

We have developed Sahara Classicure Yellow PY7924 and Magenta PR8271 that meet Blue Wool 7 specification. The Blue Wool scale does not take into accout weathering, it is an indication of resistance to fading in a protected environment. These inks are aimed mainly at the plant label market.
In order to achieve better weather fastness it is recommended that a suitable protective coating is applied over plant labels. See Classicure High Gloss Protective Lacquer MV8186.